c8i-flex.4xlarge by Amazon Web Services

c8i-flex.4xlarge is a Compute optimized [Intel processors] Gen8 4xlarge server offered by Amazon Web Services with 16 vCPUs, 32 GiB of memory and 0 GB of storage. The pricing starts at 0.0712 USD per hour.
16 vCPU
32 GiB Memory
Spare SCore
17,288
(All-cores)
2,123
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c8i-flex.4xlarge
Description
Compute optimized [Intel processors] Gen8 4xlarge
Family
c8i-flex
Hw Virt
Status
active
Observed At
2026-10-29T06:26:09.720203

Availability

REGION / IDSPOTONDEMAND
(MY) / ap-southeast-5
0.203733 USD/h 0.698 USD/h
Hyderabad (IN) / ap-south-2
0.0712 USD/h 0.7122 USD/h
Ohio (US) / us-east-2
0.155233 USD/h 0.7122 USD/h
Mumbai (IN) / ap-south-1
0.235667 USD/h 0.7122 USD/h
Northern Virgina (US) / us-east-1
0.301 USD/h 0.7122 USD/h
Oregon (US) / us-west-2
0.29275 USD/h 0.7122 USD/h
Aragón (ES) / eu-south-2
0.0767 USD/h 0.7641 USD/h
Dublin (IE) / eu-west-1
0.427067 USD/h 0.7642 USD/h
Quebec (CA) / ca-central-1
0.301967 USD/h 0.7792 USD/h
Seoul (KR) / ap-northeast-2
0.18715 USD/h 0.8044 USD/h
Frankfurt (DE) / eu-central-1
0.3251 USD/h 0.8127 USD/h
Singapore (SG) / ap-southeast-1
0.3238 USD/h 0.8212 USD/h
London (GB) / eu-west-2
0.2961 USD/h 0.8462 USD/h
Paris (FR) / eu-west-3
0.3237 USD/h 0.8462 USD/h
California (US) / us-west-1
0.24195 USD/h 0.8882 USD/h
Tokyo (JP) / ap-northeast-1
0.3397 USD/h 0.8966 USD/h
Sydney (AU) / ap-southeast-2
0.3397 USD/h 0.9301 USD/h
Cape Town (ZA) / af-south-1
0.308233 USD/h 0.9552 USD/h
(NZ) / ap-southeast-6
0.273133 USD/h 0.9766 USD/h
Sao Paulo (BR) / sa-east-1
0.160767 USD/h 1.0977 USD/h

Processor

vCPUs
16
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
8
CPU Speed
3.9 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
6975P-C
CPU L1D Cache
48 KiB
CPU L1D Cache Total
384 KiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
512 KiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
16 MiB
CPU L3 Cache
480 MiB
CPU L3 Cache Total
480 MiB
CPU Flags
fpu, vme, de, pse, tsc, msr, pae, mce, cx8, apic, sep, mtrr, pge, mca, cmov, pat, pse36, clflush, mmx, fxsr, sse, sse2, ss, ht, syscall, nx, pdpe1gb, rdtscp, lm, constant_tsc, rep_good, nopl, xtopology, nonstop_tsc, cpuid, tsc_known_freq, pni, pclmulqdq, ssse3, fma, cx16, pdcm, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, tsc_deadline_timer, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, abm, 3dnowprefetch, cpuid_fault, ssbd, ibrs, ibpb, stibp, ibrs_enhanced, fsgsbase, tsc_adjust, bmi1, avx2, smep, bmi2, erms, invpcid, avx512f, avx512dq, rdseed, adx, smap, avx512ifma, clflushopt, clwb, avx512cd, sha_ni, avx512bw, avx512vl, xsaveopt, xsavec, xgetbv1, xsaves, avx_vnni, avx512_bf16, wbnoinvd, ida, arat, avx512vbmi, umip, pku, ospke, waitpkg, avx512_vbmi2, gfni, vaes, vpclmulqdq, avx512_vnni, avx512_bitalg, tme, avx512_vpopcntdq, rdpid, bus_lock_detect, cldemote, movdiri, movdir64b, md_clear, serialize, amx_bf16, avx512_fp16, amx_tile, amx_int8, flush_l1d, arch_capabilities
Ecpus
8.1
Scalability
50.62

System Resources and Accelerators

MEMORY
Memory Amount
32 GiB
Memory Amount Actual
32 GiB
Memory Generation
DDR5
Memory Speed
7200 Mhz
ACCELERATORS
Accelerator Count
0
Accelerator Memory Min
0 MiB
Accelerator Memory Total
0 MiB
Accelerators
    STORAGE
    Storage Size
    0 GB
    Storages
      NETWORK
      Network Speed Baseline
      3.75 Gbps
      Network Speed Max
      15 Gbps
      Network Storage Speed Baseline
      2.5 Gbps
      Network Storage Speed Max
      10 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A compute-optimized x86_64 instance featuring high-speed DDR5 memory and strong single-threaded performance for text processing and compilation workloads.

      Compute OptimizedGeneral Purpose

      The Amazon Web Services c8i-flex.4xlarge is a compute-optimized instance featuring an Intel Xeon 6975P-C x86_64 processor with 16 vCPUs, 8 physical cores, and a 3.9 GHz clock speed. It is configured with 32.0 GB of DDR5 memory running at 7 GHz, providing 2.0 GB of RAM per core, and operates on the Nitro hypervisor with a 4 Gbps baseline network bandwidth. The instance does not include local storage or GPUs. Benchmarks show strong single-core capabilities, with top 25% performance in single-threaded gzip compression and Geekbench single-core tests, alongside top-tier text processing and small-model LLM text generation. Lacking local storage, it relies on network-attached storage. This instance is well-suited for compute-intensive workloads such as software compilation, text processing, and lightweight machine learning inference.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      1.6Score
      Precomputed compound score for Cache Intensive workloads. A weighted average (geometric mean) of benchmark scores compared to their medians: score = ∏ (x_i / m_i)^(w_i / Σw). The score of 1.0 represents a synthetic baseline server with the median performance of each component benchmark; 0.5 means roughly half the performance; and 2.0 means twice the performance of that reference profile. Component weights: 50% Redis RPS (pipeline=1, SET), 20% Redis RPS (pipeline=16, SET), 10% PassMark Memory Mark (composite), 10% Memory bandwidth (read, 16 MB ~ L3), 10% PassMark single-thread CPU. Rationale for component selection: In-memory key-value store workload, mixing direct Redis performance metrics with memory speed and latency benchmarks, and single-core CPU performance profiles.
      Component Score Weight Impact
      Raw Reference Normalized Target Actual
      Redis RPS (pipeline=1, SET) 3,502,054 ops/sec 1,919,289 ops/sec 1.8 50.00% 50.00% +34.00%
      Redis RPS (pipeline=16, SET) 19,546,208 ops/sec 11,728,058 ops/sec 1.7 20.00% 20.00% +11.00%
      PassMark Memory Mark (composite) 2,357 2,416 1 10.00% 10.00% 0.00%
      Memory bandwidth (read, 16 MB ~ L3) 168,190 MB/sec 108,466 MB/sec 1.5 10.00% 10.00% +4.10%
      PassMark single-thread CPU 3,272 Mops/s 2,365 Mops/s 1.4 10.00% 10.00% +3.40%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,160

      Geekbench Multi-Core

      Score: 13,138

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 29,119
      Compression
      		 319,886
      Encryption
      		 18,133
      Extended Instructions
      		 22,620
      Floating Point Maths
      		 59,727
      Integer Maths
      		 82,445
      Physics
      		 3,867
      Prime Numbers
      		 177
      Single Threaded
      		 3,272
      String Sorting
      		 42,161

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,357
      Database Operations
      		 8,867
      Memory Latency
      		 74
      Memory Read Cached
      		 28,853
      Memory Read Uncached
      		 12,182
      Memory Write
      		 11,254

      Stress-ng Raw Scores

      Stress-ng Relative Multicore Performance

      LLM Inference Speed for Prompt Processing

      LLM Inference Speed for Text Generation

      Static Web Server

      Redis

      Alternatives

      Servers of the Same Family

      INSTANCEvCPUsMEMORYAccelerators
      c8i-flex.large 24 GiB0
      c8i-flex.xlarge 48 GiB0
      c8i-flex.2xlarge 816 GiB0
      c8i-flex.8xlarge 3264 GiB0
      c8i-flex.12xlarge 4896 GiB0
      c8i-flex.16xlarge 64128 GiB0

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      c8i-flex.4xlarge FAQs